Danfoss VLT HVAC Drive FC 100 Service Manual page 146

High Power Service Manual for VLT
Adjustable Frequency Drives
7. Remove twelve (T30) screws from the output (lower) side of the IGBT modules.
8. Remove the retaining nut (8 mm) from each intermediate IGBT output bus bar. Remove
the intermediate IGBT bus bars.
9. Remove 4 nuts (10 mm), two on either side, connecting the rectifier DC bus bars to the
main DC bus bars. These are located to either side of the SCR/diode modules.
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1
Figure 7.13: D2/D4 SCR/Diode Module (2 of 4)
1 Retaining screws (Step 9)
2 Retaining nut (Step 8)
3 IGBT module
4 Main DC bus bar BB25 (Step 9)
5 Bus bar BB27
6 Bus bar BB26
®
FC Series
3
2
11
10
7
8
9
10
11
MG.90.L1.22 - VLT ® is a registered Danfoss trademark
7 D-Frame Sizes Disassembly and Assembly
4
5
7
8
9
IGBT output retaining screws (Step 7)
Retaining screws (Step 9)
Intermediate IGBT output bus bar BB30 (Step 8)
Bus bar BB31
Bus bar BB30
Instructions
7
6
7-15